SOLUTION: A phone company offers two monthly charge plans. In Plan A, there is no monthly fee, but the customer pays 8 cents per minute of use. In Plan B, the customer pays a monthly fee of

Algebra ->  Inequalities -> SOLUTION: A phone company offers two monthly charge plans. In Plan A, there is no monthly fee, but the customer pays 8 cents per minute of use. In Plan B, the customer pays a monthly fee of       Log On


   

Question 1189610: A phone company offers two monthly charge plans. In Plan A, there is no monthly fee, but the customer pays 8 cents per minute of use. In Plan B, the customer pays a monthly fee of $3.60 and then an additional 7 cents per minute of use.
For what amounts of monthly phone use will Plan A cost at least as much as Plan B?
Use m for the number of minutes of phone use in a month, and solve your inequality for m.
Answer by ikleyn(52832) About Me  (Show Source):
You can put this solution on YOUR website!
.

    Plan A     Plan B

    0.08m >= 3.60 + 0.07m   dollars


    0.08m - 0.07m >= 3.60

        0.01m     >= 3.60

            m     >= 3.60%2F0.01 = 3.60*100 = 360 minutes.    ANSWER

Solved.